Bending of kerf chiral fractal lattice metamaterials
Bending of kerf chiral fractal lattice metamaterials
We describe the out-of-plane bending of kerf chiral fractal lattices metamaterials by using a combination of theoretical models, full-scale finite elements and experimental tests representing the flexural behaviour of metamaterial beams under three-point bending. Good agreement is observed between the three sets of results. Parametric analyses show a linear log-log relation between bending modulus and aspect ratios of the unit cells, which are indicative of the fractal nature of the metamaterial. The ratio between the bending and in-plane tensile moduli of these chiral fractal metamaterials ranges between ~ 5 and ~ 34 and is linearly proportional to the square of the ratio between length and width of the ribs of the chiral unit cells at different fractal orders. These properties suggest that the class of chiral fractal lattice metamaterials offer metacompliance properties between the flexural and in-plane stretching behaviours, which can be tailored by the adoption of the fractal scales.
Chiral fractal lattice, Kerfing, Mechanical metamaterial, Mechanical properties, Out-of-plane bending
Zhang, Wenjiao
3c0e7a81-95f7-450a-9fb5-b29df0c07c2b
Neville, Robin
b330d94c-19dd-48da-8f8a-f03e04677267
Zhang, Dayi
d94dcef6-922c-4905-a952-50d96d2fa8bd
Yuan, Jie
4bcf9ce8-3af4-4009-9cd0-067521894797
Scarpa, Fabrizio
684472c3-1a28-478a-a388-5fd896986c1d
Lakes, Roderic
e604e14e-87ff-47d4-b25a-a96fe841f075
15 August 2023
Zhang, Wenjiao
3c0e7a81-95f7-450a-9fb5-b29df0c07c2b
Neville, Robin
b330d94c-19dd-48da-8f8a-f03e04677267
Zhang, Dayi
d94dcef6-922c-4905-a952-50d96d2fa8bd
Yuan, Jie
4bcf9ce8-3af4-4009-9cd0-067521894797
Scarpa, Fabrizio
684472c3-1a28-478a-a388-5fd896986c1d
Lakes, Roderic
e604e14e-87ff-47d4-b25a-a96fe841f075
Zhang, Wenjiao, Neville, Robin, Zhang, Dayi, Yuan, Jie, Scarpa, Fabrizio and Lakes, Roderic
(2023)
Bending of kerf chiral fractal lattice metamaterials.
Composite Structures, 318, [117068].
(doi:10.1016/j.compstruct.2023.117068).
Abstract
We describe the out-of-plane bending of kerf chiral fractal lattices metamaterials by using a combination of theoretical models, full-scale finite elements and experimental tests representing the flexural behaviour of metamaterial beams under three-point bending. Good agreement is observed between the three sets of results. Parametric analyses show a linear log-log relation between bending modulus and aspect ratios of the unit cells, which are indicative of the fractal nature of the metamaterial. The ratio between the bending and in-plane tensile moduli of these chiral fractal metamaterials ranges between ~ 5 and ~ 34 and is linearly proportional to the square of the ratio between length and width of the ribs of the chiral unit cells at different fractal orders. These properties suggest that the class of chiral fractal lattice metamaterials offer metacompliance properties between the flexural and in-plane stretching behaviours, which can be tailored by the adoption of the fractal scales.
Text
1-s2.0-S0263822323004129-main
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More information
Accepted/In Press date: 21 April 2023
e-pub ahead of print date: 30 April 2023
Published date: 15 August 2023
Keywords:
Chiral fractal lattice, Kerfing, Mechanical metamaterial, Mechanical properties, Out-of-plane bending
Identifiers
Local EPrints ID: 478816
URI: http://eprints.soton.ac.uk/id/eprint/478816
ISSN: 0263-8223
PURE UUID: 46455e6b-e83f-4744-9e89-a14e5ae1d899
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Date deposited: 11 Jul 2023 16:37
Last modified: 17 Mar 2024 04:20
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Contributors
Author:
Wenjiao Zhang
Author:
Robin Neville
Author:
Dayi Zhang
Author:
Jie Yuan
Author:
Fabrizio Scarpa
Author:
Roderic Lakes
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